Here's a link to various health statistics among states. The link given shows prevalence of heart disease across the US, but you can compare by incidence of cancer, diabetes, obesity, death by firearms, infant mortality, etc.
The western states are generally pretty "healthy" but I did notice a higher incidence of death by firearms. Is the west still wild?
Only a handful of states have low obesity rates: Arizona, Utah, Colorado, Montana, and Florida. I should clarify: only a few visible states have that low incidence. Connecticut, Massachusetts, Rhode Island, and Vermont score well also, but you can barely see them on the map.